Spraying apparatus.



PATENTED AUG. 15, 1905.

C. GIBSON. SPRAYING APPARATUS. APPLICATION rum) 813F121, 1003.

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- WITNESSES:

A; A TTOHIVE rs PATENTED AUG. 15, 1905.

0. GIBSON. SPRAYING APPARATUS.

APPLICATION FILED SEPT 21,1903.

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4 UNITED STATES PATENT OFFICE.

SPRAYING APPARATUS.

Specification of Letters Patent.

Patented Aug. 15, 1905.

Application filed September 21, 1903. serial No. 173,925.

To all whom it may concern.-

Be it known that I, CLINTON GIBsoN, a citizen of the United States, residing at Allegan, county of Allegan, State of Michigan have invented certain new and useful Improvements in Spraying Apparatus, of which the following is a specification, reference being had therein to the accompanying drawings, in which Figure 1 is a side elevation of the apparatus; Fig. 2, an end elevation thereof; Fig. 3, a horizontal sectional view of the pump, taken on line III III of Fig. 2; Fig. 4, a vertical sectional view of the pressure-tank; Figs. 5

and 6, a vertical sectional view and a horizontal sectional view, respectively, of a pressuretank in which the liquid-containing tank is substantially equal in size to the interior of the main tank.

This invention relates particularly to that class of spraying apparatus used in spraying trees; and it has for its main object to pro-' vide a compact apparatus of large capacity which will be exceedingly simple in construction and in operation.

A further object of the invention is to provide an acid-proof pressure-tank of simple and cheap construction.

Other important objects and advantages will appear hereinafter.

Referring to the various parts by numerals, 1 designates the pump-cylinder, which is secured at its ends in suitable standards 2. This cylinder is provided with the heads 3, one of which is provided with the stuflingbox 4, through which passes the piston-rod 5. Within the cylinder on the inner end of the piston-rod is mounted the double-ended piston-head 6. Connected to the pump-cylinder, at each end thereof, are outlet-pipes 7 which are provided with the outward-opening check-valves 8, the outer end 'of these pipes being connected by a common dischargepipe 9. Connected to the cylinder, at-each end thereof and opposite the outlet-pipes, are the inlet-pipes 10, each of these pipes being provided with an inward-opening check-valve 11. The outer ends of these inlet-pipes are connected to a common intake 12. One end of this intake-pipe is closed by a screw-plug 13, the other end thereof being provided with a coupling 14. Connected to the coupling 14 is a short section of pipe15, whose free end is adapted to be placed in the tank containing the liquid that is to be sprayed. One end of the discharge-pipe 9 is provided with a coupling 16, to which is connected the pipe 17, this latter pipe entering the pressure-tank 18 at the bottom thereof, said pressure-tank being otherwise hermetically sealed. To the outerend of the piston-rod 5 is connected a vertical cross-bar 19, to the ends of which are secured horizontal rods 20, said rods lying parallel with the pump-cylinder. The lower one of these rods extends through apertures in standards 2 and is guided thereby, and the other one fits and slides in the guide 21, formed on the top of the standards. The forward ends of these rods are connected by link 22, said link being pivotally connected midway its ends to the vertical operating-lever 23. The lower end of this lever is pivotally mounted in the forward end of the link 24, said link extending rearward through a vertical slot in the forward standard 2 and being pivotally mounted on the rear standard. This link is vertically adjustable at its rear end, and the lever 23 is provided with a vertical series of apertures in order that the link 24 may be vertically adjusted thereon to vary the strokes of the pump-piston. Connected to one end of the discharge-pipe is a coupling 30, to which is attached a spraying-pipe 31, the latter pipe being provided with a suitable stop-cock and a spraying-nozzle. All the parts of this pump with which the liquid to be sprayed will come in contact are to be of brass, except, of course, the piston-packing, which may be of leather or other suitable material. The cylinder 1 will be provided with a brass lining 27.

To provide an acid-proof pressure-tank strong enough to resist the desired internal pressure (about two hundred pounds) at minimum cost, I employ a strong galvanized-iron tank 34 and place within it the thin copper tank 35, this latter tank being preferably of about one-half the capacity of the main tank and slightly smaller in diameter, so that said tank is surrounded except its bottom with an air-space, the bottom of the tank resting on the bottom of the main tank, and both bottoms being convex to give them strength. On the lower end of the side walls of the supplemental tank are formed the horizontal outward-extending flanges 36, which fits between two packing-rings 37, one of said rings resting on the bottom 38 of the supplemental tank. .The lower end of the main tank is provided with the outward-extending horizontal flanges 39, through which pass bolts 40, said bolts extending through the packing-rings and the bottom of the two tanks and securely clamping the parts together. The upper end of the supplemental tank is in communication with the air-space of the main tank by small tube 41, and the lower end of this supplemental tank is in communication with the dischargepipe of the pump through pipe 17. A suitable pressure-gage is connected to this tank. The purpose of this construction of the tank is obvious. The liquid to be sprayed will be contained in the copper tank and said tank will be surrounded, except at its bottom, by the air in the main tank, so that there will be no strain on said tank caused by the air-pressure. It will readily be seen that the copper tank may be exceedingly thin, and therefore cheap, and yet will last indefinitely. This tank is preferably provided with the base 42, to which it is secured by means of the clamps 43.

In using this apparatus the pump is first operated as an air-pump,the pipe connected to the intake being removed from the liquid-supply tank and the cock 34 in the spray-pipe closed. When air has been forced into the pressuretan k and the desired pressure therein secured, the intake-pipe is placed in the tank containing the liquid to be sprayed and the pump again operated, thereby forcing the liquid into the pressu re-tank against the air-pressure therein. This is continued until the proper supply of liquid is in the tank and the pressure has been raised to a degree actually greater than is necessary to do thorough Work. The stopcock 34 near the spraying-nozzle may then be opened. When the pressure in the pressure-tank has been reduced by the escape of theliquid to nearly the startingpoint, the pump may again be operated to force more liquid therein without stopping the spraying operation. It will be, of course, understood that if the pump is operated during the spraying operation part of the inflowing liquid passes out through the nozzle, the surplus flowing into the pressure-tank. As the capacity of the pump is very much in excess of thenozzle-discharge, it will only be necessary to operate the pump a short time compared to the time occupied in the spraying operation.

From the foregoing it will be readily understood that the original air-pressure in the pressure-tan k is never lost and that it is only necessary to force air therein at the beginning of operations, the pump being used thereafter as a liquid-pump. It will also be seen that a comparatively small pressure-tank will be effective, the main supply of liquid being transported in suitable wooden tanks or casks from which it may be forced into the pressure-tank as needed. It will be further noticed that the pump is double acting, thus insuring a full supply of liquid with few operations of the piston.

It is of course obvious that the supplemental liquid-containing tank may be almost as large as the interior of the main tank, if desired, it being only necessary to leave an airspace surrounding the inner tank and to have the top of the liquid-tank in open communication with said air-space.

In Figs. 5 and 6 is illustrated a pressuretank in which the inner liquid-containin g tank is substantially the same size as the interior of the main tank, the air-space around the liquid-containing tank being dispensed With. The inner tank 35 in this form is provided with vertical corrugations 35 which permit the tank to expand slightly under pressure so that it Will fit snugly against the interior ofthe main tank, this latter tank supporting the thin inner tank and taking up all of the inter nal strain. In this form the inner tank is closed except for the inlet and exit pipe 17. This form of tank is especially adapted for small apparatus.

The pump and the pressure-tank may be secured to a suitable base in order that they may be readily transported, and it Will of course be understood that if it be desired this base may be mounted upon suitable transporting-wheels.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is-

1. In an apparatus of the class described, the combination of a pump-cylinder, apiston and piston-rod, valved inlet-pipes connected to the opposite ends of said cylinder, a supplypipe connected to these inlets, valved outlets arranged at the opposite side of said cylinder at its opposite ends, apipe Qconnecting these two outlets, a spray-hose connected to one end of said pipe 9 and provided With a stop-cock, a pressure-tank, and apipe connecting the opposite end of said connection 9 with the bottom of said tank, as and for the purposes set forth.

2. In a pressure-tank for liquid-spraying apparatus, the combination of a pumping device and a pressure-tank, an acid-proof expansive liquid-receptacle in said pressure-tank, said receptacle being provided with corrugations to permit it to expand.

3. In a liquid-spraying apparatus. the combination 'of a pumping device, and a pressuretank connected thereto, this pressure-tank containing an acid-proof expansive liquid-receptacle adapted when expanded to lie against the interior of the tank, for the purpose set forth.

In testimony whereof I hereunto affix my signature, in the presence of two Witnesses, this 14th day of September, 1903.

GLIN TON GIBSON.

WVitnesses:

FRED I. CHIoHEsTER, H. D. PRITCI-IARD. 

